Ductilizing of cast hypereutectic Al–17%Si alloy by friction stir processing

Saini, Nitin; Pandey, Chandan; Dwivedi, Dheerendra Kumar

doi:10.1177/0954408917737735

Cited by 23 publications

(5 citation statements)

References 30 publications

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“…e UTS of 303.153 MPa and joint efficiency of 86.60% for the friction stir-processed FSWed joint shows a clear increment along the joint while the unprocessed shows some fluctuations. e main reason for the increase in tensile properties of the friction stirprocessed FSWed joints is that the joints were re-reheated and re-recrystallized using the same parameters used for welding to enhance the mechanical properties and refine grain sizes [44,45,67]. A similar behaviour was also reported on the study by Salman et al [20].…”

Section: Tensile Testssupporting

confidence: 60%

Effect of Friction Stir Processing on Gas Tungsten Arc-Welded and Friction Stir-Welded 5083-H111 Aluminium Alloy Joints

Mabuwa

Msomi

2019

Advances in Materials Science and Engineering

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This paper presents the analysis of the friction stir-processed aluminium alloy 5083-H111 gas tungsten arc-welded and friction stir-welded joints. The comparative analysis was performed on the processed and unprocessed gas tungsten arc-welded and friction stir-welded joints of similar aluminium alloy 5083-H111. The results showed a clear distinction between the friction stir processed joints and unprocessed joints. There is a good correlation observed between the microstructural results and the tensile results. Ultrafine grain sizes of 4.62 μm and 7.177 μm were observed on the microstructure of the friction stir-processed friction stir-welded and gas tungsten arc-welded joints. The ultimate tensile strength for friction stir-welded and gas tungsten arc-welded before friction stir processing was 153.75 and 262.083 MPa, respectively. The ultimate tensile strength for friction stir processed friction stir-welded joint was 303.153 MPa and gas tungsten arc-welded joints one was 249.917 MPa. The microhardness values for the unprocessed friction stir-welded and gas tungsten arc-welded joints were both approximately 87 HV, while those of the friction stir-processed ones were 86.5 and 86 HV, respectively. The application of friction stir processing transformed the gas tungsten arc morphology from brittle to ductile dimples and reduced the ductile dimple size of the unprocessed friction stir-welded joints from the range of 4.90–38.33 μm to 3.35–15.59 μm.

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Section: Tensile Testssupporting

confidence: 60%

Effect of Friction Stir Processing on Gas Tungsten Arc-Welded and Friction Stir-Welded 5083-H111 Aluminium Alloy Joints

Mabuwa

Msomi

2019

Advances in Materials Science and Engineering

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“…Thus, the usage of scandium-containing filler material for welding complex hulls of aircraft engines made of a magnesium alloy of the Mg-Zr-Nd system allows for a highquality weld and ensures the reliable operation of critical units. It is worth stressing that similar research is also being developed for others alloys, such as aluminum [45,46], and some obtained results could be an inspiration for others materials.…”

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confidence: 75%

Casting Welding from Magnesium Alloy Using Filler Materials That Contain Scandium

et al. 2022

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Based on the results achieved in systematic studies of structure formation and the formation of multicomponent phases, a scandium-containing filler metal from system alloy Mg-Zr-Nd for welding of aircraft casting was developed. The influence of scandium in magnesium filler alloy on its mechanical and special properties, such as long-term strength at elevated temperatures, was studied by the authors. It is established that modification of the magnesium alloy with scandium in an amount between 0.05 and 0.07% allows a fine-grained structure to be obtained, which increases its plasticity up to 70% and heat resistance up to 1.8 times due to the formation of complex intermetallic phases and the microalloying of the solid solution. Welding of the aircraft castings made of magnesium alloy with scandium-containing filler material allows obtaining a weld with a dense homogeneous fusion zone and the surrounding area without any defects. The developed filler material for welding surface defects (cracks, chips, etc.) formed during operation on aircraft engine bodies makes it possible to restore cast body parts and reuse them. The proposed filler material composition with an improved set of properties for the welding of body castings from Mg-Zr-Nd system alloy for aircraft engines makes it possible to increase their reliability and durability in general, extend the service life of aircraft engines, and obtain a significant economic effect.

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Section: Resultsmentioning

confidence: 99%

“…The microhardness of R.S is comparatively higher than A.S owing to the formation of excellent fine recrystallization grains by means of significant plastic deformation by the tool tilt angle of 2°. [33][34][35] Compared to the plain AA7075 alloy and FSPed sample, the SCs exhibit better hardness behaviour. Addition of emery and FA particles will tend to resist deformation during indentation which eventually raises the hardness of SCs.…”

Section: Microhardnessmentioning

confidence: 99%

Influence of Fly Ash and Emery based particulate reinforced AA7075 surface composite processed through friction stir processing

Suganeswaran

Parameshwaran

Sathiskumar³

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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The novel friction stir technology is adopted in modern automotive industries to meet the desired properties like hardness, impact toughness and tribological behaviour over the conventional techniques like stir casting, compo casting, squeeze casting, electroplating and infiltration methods. AA7075 surface composites fabricated with different volume fractions of fly ash and emery particles is said to enhance the aforementioned properties. The composites are processed through friction stir process (rotational speed −1200 rpm, transverse speed – 56 mm/min, tool tilt angle – 2 °). During characterization, the Microstructural examination of surface composites depicts fine and homogenous distribution of reinforcements in the friction stir process region owing to severe plastic deformation and dynamic recrystallization process. Substantially, good interface is formed between the reinforcement particulates and base substrate. Inclusion of Fe3O4, Al2O3 and SiO2 constituents through fly ash and emery reinforcements associated with the homogenous dispersion strengthening mechanism favours for the superior hardness of surface hybrid composite specimen 50E50FA. Decremented grain size and load bearing capacity of the reinforcements is beneficial for the crack propagation resistance that enhances the impact toughness behaviour (17.4 J/cm2) of the same specimen. Wear rate of the specimens are evaluated through pin on disc tribometer. The decrease in the wear rate of hard specimen 50E50FA is observed due to the reduced contact area between its surface and counter disc. The morphology of worn specimens using SEM analysis shows the combined abrasive and adhesive wear as the worn mechanism.

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Ductilizing of cast hypereutectic Al–17%Si alloy by friction stir processing

Cited by 23 publications

References 30 publications

Effect of Friction Stir Processing on Gas Tungsten Arc-Welded and Friction Stir-Welded 5083-H111 Aluminium Alloy Joints

Effect of Friction Stir Processing on Gas Tungsten Arc-Welded and Friction Stir-Welded 5083-H111 Aluminium Alloy Joints

Casting Welding from Magnesium Alloy Using Filler Materials That Contain Scandium

Influence of Fly Ash and Emery based particulate reinforced AA7075 surface composite processed through friction stir processing

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